package com.atguigu.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

@Service
public class PaymentService {

    private Logger logger = LoggerFactory.getLogger(PaymentService.class);

    /**
     * 正常访问，肯定OK
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池: " + Thread.currentThread().getName() + " paymentInfo_OK,id: " + id + "\t" + "O(∩_∩)O哈哈~";
    }

    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")// 允许的最大时间
    })
    public String paymentInfo_TimeOut(Integer id) {
        int timeNumber = 3;
        try {
            TimeUnit.SECONDS.sleep(timeNumber);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
//        int timeNumber = 10/0;
        return "线程池: " + Thread.currentThread().getName() + " ,id: " + id + "\t" + "O(∩_∩)O哈哈~, 耗时(秒):" + timeNumber;
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        logger.info("paymentInfo_TimeOutHandler");
        return "线程池: " + Thread.currentThread().getName() + " 8001系统繁忙或者允许出错，请稍后再试,id: " + id + "\t" + "o(╥﹏╥)o";
    }


    // 服务熔断


    // 开启断路器，在10秒内，10次请求中，失败率达到60%就会打开断路器，正确也不会返回正确的结果，
    // 然后经过窗口期，如果正常访问，有可以访问
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),   //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),//请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),//时间范围（窗口期）（毫秒）
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60")//失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("***************id 不能为负");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号：" + serialNumber;
    }
    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能为负，请稍候再试，/(ToT)/~~  id:" +id;
    }
}
